Steam-boiler.



No. 686,720. Patented Nov. l9, l90l.

W. M. ERNST.

STEAM BOILER.

(Application filed. Apr. 22, 1901,) (No Model.) 3 Shoots-Sheet l.

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STEAM BOILER.

(Application filed Apr, 22, 1901.)

(No Model.) 3 Sheets-Sheet 3.

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UNITED STATES PATENT OFFICE.

YVILLIAM M. ERNST, OF NEW YORK, N. Y.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 686,720, dated November 19, 1901.

Application filed April 22, 1901.

To all whom it may concern.-

Be it known that I, WILLIAM M. ERNST, a citizen of the United States, and a resident of New York city, borough of Manhattan, State of New York, have invented certain new and useful Improvements in Steam- Boilers, of which the following is a specification.

My invention has reference to the type of boilers commonly called Water-tube boilers, in which a water-drum or a steam and Water drum is connected with front and rear headers between which tubes are interposed; and the main object of my invention is to provide improved means for enabling a flame that issues from a burner, nozzle, or the like to be burned in the midst of the water-tubes.

My invention more especially pertains to the class of water-tube boilers in which a pinrality or nest of headers at one end of the boiler are connected by tubes with corresponding headers at the opposite end of the boiler.

In carrying out my invention I utilize a plurality of headers at opposite ends of the boiler to which a plurality of water-tubes are connected, and in the midst of said tubes I provide a longitudinallydisposed space which opens through the front headers, and at the front end of the boiler I provide means for permitting a flame to be projected into said space to be burned in the midst of the tubes.

The invention further consists in the various details of improvements that will be more fully hereinafter set forth and then pointed out in the claims.

Reference is to be had to the accompanying drawings, forming part hereof, wherein- Figure 1 is a front elevation of aboiler embodying my improvements, part of the covers of the headers being omitted. Fig. 1 is a detail section, enlarged, on the line 00 a; in Fig. 1. Fig. 2 is a vertical section on the plane of the line 2 2 in Fig. 1, and Fig. 3 is a similar View showing a modified arrangement for carrying the heat and products of combustion through the midst of the watertubes.

Similar numerals of reference indicate corresponding parts in the several views of theaccompanying drawings.

headers in well-known manner.

In the drawings the numeral 1 indicates a Serial No. 56,826. (No model.)

drum which may be for water or water and steam. In Fig. 1 I have shown two of such drums side by side. 2 3 are respectively front and rear headers, which are connected with Water-tubes 4 in well-known manner. As shown in Fig. 1, there are a plurality of upwardly-extending headers placed side by side, and the front openings in the headers in line with the tubes l may be provided with closures 5 in Well-known manner to permit access to the water-tubes. Corresponding headers are alined at the front and rear of the boiler, and the intermediate tubes connect the water-spaces of the corresponding The headers are connected with the respective drums 1 by interposed tubes or conduits 6 in wellknown manner, so that circulation through the tubes and headers in conjunction with the drums will be maintained. I have not shown means for feeding Water to the drums and carrying away steam, as this forms no part of my present invention and may be provided in any well-known manner.

Within the midst of the tubes, preferably near the lower portion, I provide a longitudinally-extending space into Which a flame from a nozzle, burner, or the like may be projected so as to burn within the midst of the tubes. For this purpose I have shown headers 2, which are connected to the two outside headers and are continued down beneath the central bank of headers and under the same, as clearly indicated in Fig. 1, the headers 2 being shown riveted to the lower ends of the headers 2, as at 2, providing circulation between them. To the headers 2 wator-tubes 4 are connected in manner similar to the tubes 4: in connection with the headers 2, and thus as the headers 2 are continued down below the outside headers 2 and bencath the central headers a space 7 is formed within the nest of tubes at 4?, extending lengthwise of the tubes. At the front is an opening 7 through the headers in line with the space 7, and I have shown a frame or casting 8 as lining said headers at the lower ends of the headers 2 and the inner walls of the headers 2. The frame or casting8 is shown provided with a closure or front wall 9, which may be in the form of a plate removably attached to said frame, and this front wall is refuse from the space 12.

The headers 2 at their lower ends are closed, as at 2, so that the water from the corresponding tubes will circulate upwardly through the headers 2 to the drums. The arrangement is such that the tubes 4 4i inclose the space 7, so that the flame projected through the opening 9* will be surrounded on all sides by water-tubes, and thus not only the heat that rises from the flame has its effect upon the tubes 4, but the heat that radiates laterally and downwardly also acts upon the tubes 4 and the water therein, whereby increased efficiency in steam-making is pro duced. The nest of tubes is preferably surrounded, so as to retain the heat in their midst, and for this purpose may be placed within a brick setting or the like, as indicated at 14, or may be enveloped by a sheet-metal casing 15, or by both. The casing 15 may be lined with fireproof brick 16, if desired, to protect it from the heat and deposits from combustion. a

In Fig. 2 I have shown the rear headers as provided with a frame or casing 8, similar to the frame 8, the rear ends of the tubes 4 being connected with headers 3 similar to the headers 2 and similarly passing down heneath and under the upper headers 3. The frames 8 8 having centrally-disposed openings, permit the flame and products of combustion to pass directly through space 7 in the midst of the series of tubes. In Fig. 2 I have shown a stack or flue 17, connected in line with the opening in the frame 8. From this it will be understood that as the flame is projected through the opening in the front headers it will find an outlet through the opening in the frame 8 after passing through the space 7 in the midst of the tubes. Instead, however, of having a frame 8 provided With an opening the rear end of space 7 can be closed, as by continuing the headers 3 to the bottom of the series of tubes 44?, the tubes all being connected therewith in well-known manner, and the tubes will all be inclosed, as by the casing 15 or in other suitable manner. Above the series of tubes, however, and above the headers 3 the space at the rear is suitably'clo'sed, as by a plate 18, provided with an opening 18 and the stack 17 is connected with said plate in line with said opening, so as to carry off the products of combustion, &c. In this form of my invention it will be seen that the flame is projected through the front frame 8 and through the space 7 in the midst of the tubes,

and as the heat and products of combustion cannot find an outlet at the rear, as in Fig. 2, they will rise through the tubes and pass out through the stack 17, as indicated by the arrows in Fig. 3.

By means of my invention I am enabled to utilize the well-known type of water-tube boilers in conjunction with a flame that may be produced by projecting gases or oil in well-known manner from a burner, nozzle, or the like. A further advantage of my invention is that it may be utilized in burning pulverized coal or fuel which may be pulverized by any suitable apparatus and projected through the front opening in line with the space '7 and burned in the midst of the tubes, the products of combustion, heat, &c., passing off as before described. The heat from the flame engages the tubes and heats the water therein, and the water circulates in manner well known in this class of boilers. Furthermore, it will be understood that by the arrangement shown the flame is completely surrounded by water-tubes, and thereby heat that might be more or less dissipated in a downward direction is caused to have effect upon the tubes 4:, and thereby such loss of heat is prevented. As shown, the headers 2 extend in substantially vertical lines side by side above the frame 8, and the latter serves to assist in sustaining the series of headers, while at the same time providing the opening through which the flame can be projected. By my invention gratebars and bridge-walls are dispensed with.

I do not limit my invention to the particular arrangement shown and described, as they may be varied without departing from the spirit thereof.

Having now described my invention, what I claim is- 1. A water-tube boiler comprising a plurality of substantially parallel headers placed side by side at the front and rear, and tubes connecting said headers, a space being provided in the midst of said tubes extending 1 longitudinally thereof and open at the front and rear and adapted to permit a flame to be projected therein longitudinally of the tubes, and a closure at the front end of said space provided with an opening adapted to receive a nozzle or burner, substantially as described.

2. A water-tube boiler comprising a plurality of upwardly-extending headers placed side by side at the front and rear, a pair of the headers being curved downwardly and inwardly and extending beneath the central bank of headers forming an opening, and water-tubes connecting corresponding headers at the front and rear, a space being provided in the midst of said headers in line with said opening extendinglongitudinally of the tubes adapted to permit a flame to be projected into said space, substantially as described.

3. A water-tube boiler comprising a plurality of upwardly-extending headers at the front and rear, a frame located beneath the front projected longitudinally of the tubes, and

spectively connected with the two outsideheaders and extending downwardly and inwardly beneath the central bank of headers forming an opening within the series of hcaders, and water-tubes connecting the corresponding front and rear headers, the tubes that are connected with said inwardly-extending headers forming a space within the midst of the tubes in line with said opening adapted to permit a flame to be projected longitudinally of the tubes, substantially as described.

5. A water-tube boiler comprising a plurality of headers placed side by side, a pair of which headers at the front and rear extend beneath the others forming front and rear openings, a closure for the front opening pro vided with means to permit a flame to be projected inwardly from the opening, and Watertubes connected with said headers and forming a space in line with said opening extending longitudinally within the series of tubes, substantially as described.

6. A water-tube boiler comprising a plurality of upwardly-extending headers located side by side and each communicating with a drum, an opening being provided within the series of headers, a closure for said opening provided with an opening adapted to receive a nozzle or burner to permit a flame to be projected from said opening, and water-tubes connected with said headers and located outside of said opening forming a space extending longitudinally within the series of headers, said space being open at the front and rear for the passage of heat and products of combustion, substantially as described.

7. A water-tube boiler comprising a plurality of upwardly-extending headers at the front and rear and placed side by side, a pair of headers at each end extending downwardly and inwardly forming openings through the corresponding series of headers, frames within said openings beneath the central series of headers, a closure for the front frame provided with an opening, a support for the inwardly-extending headers extending under the same, water-tubes connected with said headers and forming a space in line with said openings extending longitudinally of the tubes, and a stack or flue connected with the opening in the rear headers, substantially as described.

WM. M. ERNST.

Witnesses:

T. F. BOURNE, M. MANNING. 

